our technology correspondent has more. >> it is the place ever more people go to share every detail of their lives and today's big event is that now has more and a billion users. >> there is no way would where getting starting with says that i would never thought that myself or any of the people brought it would be able to be part of the black this. it is incredible. >> the student idea turned into a giant global business. this office packed with sales staff and engineers sometimes used in conventional means to get around. facebook is a young company, keen to preserve a zany upstart image. but now life is getting that the series. it needs to go on conquering new territories and prove it can make more and more money per from its growing audience. in some countries, it is hard to see where the growth will come. in the u.k., more than half the population is on. in north america, 45% use it. in africa, only 5% have signed up and in asia, only 7% of the population are users. in india, that is changing rapidly. people are typically generation becoming used to the social order. >> i am always